GASKET 1720038 - Caterpillar

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(1) Main unit
(2) Tachometer (unit)
(3) Quad gauge The Caterpillar Engine Monitoring System (EMS) is an option. The engine parameters are displayed in both digital display and analog. The EMS display is for electronically controlled engines.The EMS includes three individual gauge units. The units can be installed in various combinations. The main unit must be used if any of the units are used.For information on installation and troubleshooting, refer to Special Instruction, REHS1187, "Electronic Installation Guide".EMS Main Unit
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(4) Engine oil pressure
(5) Engine coolant temperature
(6) Fuel pressure
(7) Inlet manifold temperature
(8) Fuel temperature
(9) Engine coolant level
(10) Battery voltage
(11) Active engine derate
(12) Auxiliary temperature
(13) Auxiliary pressure The Engine Monitoring System provides warning lamps. Refer to Illustration 2. The Engine Monitoring System provides a LCD display for engine parameters. When the scroll switch is depressed, the parameters will scroll on the screen. The EMS displays the real time value for the parameter that is selected. The default is engine speed.The parameters are abbreviated on the LCD display. Table 1 lists the parameters.
Table 1
Abbreviation Parameter
Spd Engine Speed
GA-1 Engine Oil Pressure
GA-2 Coolant Temperature
GA-3 Battery Voltage
GA-4 Fuel Pressure
Boost Boost Pressure
IAirT Inlet Air Temperature
FuelT Fuel Temperature
AccrP Auxiliary Pressure
AccrT Auxiliary Temperature
Fuel Fuel Rate
Hrs Engine Hours
Load Percent of Engine Load (speed and derate) Note: For detailed information on the exact parameters for your engine, refer to the Operation and Maintenance Manual, "Gauges and Indicators".Quad Gauge Unit
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(14) Engine oil pressure
(15) Engine coolant temperature
(16) Battery voltage
(17) Fuel pressure The quad gauge unit displays the following information: engine oil pressure, engine coolant temperature, battery voltage and fuel pressureNote: The gauge needles may not always return to zero position when the engine is not running.Note: For detailed information on the exact parameters for your engine, refer to the Operation and Maintenance Manual, "Gauges and Indicators".Tachometer Unit
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(18) Tachometer The tachometer displays the engine speed (rpm) on an analog gauge.Note: For detailed information on the exact parameters for your engine, refer to the Operation and Maintenance Manual, "Gauges and Indicators".Communication Data Link
The EMS provides two pins that are connected to the data link. The data link is available to share data with other modules. The ECM processes engine parameters. The parameters will then be transmitted to the EMS through the data link. The EMS receives the information. The information is then displayed on various gauges.For additional information, refer to the Troubleshooting Manual, SENR9646, "3406E, C12, C15, and C18 Marine Engines".